﻿// 
// $Id: DataStore.cs 3981 2010-11-02 11:12:16Z unknown $
// 
// Zen UI Toolkit Copyright (c) 2010, Paul Clancy.  All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without modification, are permitted provided 
// that the following conditions are met:
// 
// * 	Redistributions of source code must retain the above copyright notice, this list of 
// 	conditions and the following disclaimer.
// 
// * 	Redistributions in binary form must reproduce the above copyright notice, this list of 
// 	conditions and the following disclaimer in the documentation and/or other materials 
// 	provided with the distribution.
// 
// * 	Neither the name of AppTek nor the names of its contributors may be used to endorse 
// 	or promote products derived from this software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 
// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 
// THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// 

#region

using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Drawing;
using System.Web.UI;

#endregion

namespace Zen.Toolkit
{
    public class ProviderCollection : Collection<ProviderBase>
    {
    }

    [ToolboxData("<{0}:DataStore runat=\"server\"></{0}:DataStore>")]
    [ToolboxBitmap(typeof (DataStore), "Resources.Icons.Toolbox.database_connect.bmp")]
    [ParseChildren(true)]
    [PersistChildren(false)]
    public class DataStore : WidgetBase, IDataStore
    {
        private ProviderCollection _providers;

        public DataStore() : base(HtmlTextWriterTag.Div)
        {
        }


        internal IDataProvider ProviderBinding
        {
            get { return (_providers == null || _providers.Count != 1) ? null : _providers[0]; }
        }


        [NotifyParentProperty(true)]
        [PersistenceMode(PersistenceMode.InnerProperty)]
        public ProviderCollection Provider
        {
            get { return _providers ?? (_providers = new ProviderCollection()); }
        }

        protected override void CreateChildControls()
        {
            if (Provider.Count > 1)
                throw (new ZenConfigurationException("Multiple providers are not (yet!) supported"));
            
            if (Provider.Count == 1)
            {
                IDataProvider provider = Provider[0];

                provider.Store = this;
                Controls.Add(Provider[0]);
            }

            base.CreateChildControls();
        }

        protected override void Render(HtmlTextWriter writer)
        {
        }
    }
}